Patent US2917474A successfully refreshed from Google Patents.
US2917474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing acrylonitrile copolymers containing free amine groups, a copolymer obtained thereby, and textile material containing fibers of said copolymer
Assignee: Acordis UK Ltd
•
Filing: 1955-05-24
•
Granted: 1959-12-15
•
Expires: 1975-05-24
Abstract
No abstract record available.
Inventors
- 👤 Fisher James Wotherspoon
- 👤 Kowolik Ernest Jan
- 👤 Stone Cyril Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:58
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/08; C08F220/00; C08F220/02; C08F220/42; C08F8/00; C08F8/04; C08F8/34; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
A POLYMER OF FORMULA:
Claim 2
Dependent Claim
4 words
A POLYMER OF FORMULA:
References Cited (Backward Citations)
US2662877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |